as world powers prepare to sit with iran, the obama administration is opening the door to sell u.s. defense systems to allies. despite a deal with iran they pose a threat not addressed by the nuclear agreement. >> no strategy is risk free. diplomacy takes kournal, vision. our emphasis on diplomatic tools should not be misinterpreted. we know diplomacy cannot operate in a vacuum. our success will hinge on america's military and the credibility and assurances to our allies and partners in the middle east that we will use it. >> he made those comment addressing leaders at a summit in bahrain. >> preparations are under way for the burial of nelson mandela. people from all over the world are gathering in johannesburg, celebrating his life with a dance or prayer. we report on the unique gift to bring people together. >> nelson mandela dreamt of a rainbow nation. maybe this is what he had in mined. leaney bruce and her family remembered him. >> to see this many people across borders and cross, singing together and honouring an amazing man. >> we are here because of nelson mandela. we live